Finding the Fourth Proportional to 105,904.07, 146,143.24 and 57,504.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105,904.07 : 146,143.24 = 57,504.10 : x
2. Step 2: Convert to fraction form
   105,904.07/146,143.24 = 57,504.10/x
3. Step 3: Cross multiply
   105,904.07x = 146,143.24 × 57,504.10
4. Step 4: Simplify right side
   105,904.07x = 8,403,835,487.28
5. Step 5: Solve for x
   x = 8,403,835,487.28/105,904.07
6. Step 6: Final answer
   x = 79,353.28